As with many seeds, castor bean seeds can survive freezing if they are properly dried before being chilled. Dry castor bean seeds with an equal weight of silica gel in a closed container for five days before freezing. This replicates scientific seed preservation, where lab workers condition seeds by holding them for several weeks at 40 degrees Fahrenheit and 25 percent humidity before long-term storage at zero degrees.
About this Author
Rogue Parrish has written two travel books and edited at the "The Baltimore Sun," "The Washington Post" and the Alaska Newspapers company. She began writing professionally in 1975. Parrish holds a summa cum laude Bachelor of Science degree in journalism from the University of Maryland.